Oracle 21c — AutoUpgrade Enhancements for RAC

By -

 One of the improvements of the AutoUpgrade tool in version 21c is the automation of certain steps involved in upgrading a RAC database.

In versions prior to Oracle 21c, the following steps had to be performed manually to upgrade a RAC database:

  1. Set the CLUSTER_DATABASE parameter to FALSE.
  2. Stop all instances in the cluster.
  3. Start one of the instances to begin the upgrade process.
  4. Reset the CLUSTER_DATABASE parameter to TRUE after the upgrade is complete.
  5. Start all instances.
  6. Register the new version in the cluster.

In version 21c, these steps are automatically handled by the AutoUpgrade tool (this feature was later backported to Oracle version 19.8 and above as well).

The method for upgrading a database to version 21c using the AutoUpgrade tool has already been explained previously, so we will not repeat it here. We will only emphasize that before starting the upgrade process, all instances must be in the open state.

Zoom image will be displayed

Below is an example log entry from this upgrade process:

2022-02-05 09:59:40.024 INFO Updating parameter *.cluster_database=’true’ to *.cluster_database=’FALSE’ in /home/oracle/AutoUP_TO_21c/inst1/temp/during_upgrade_pfile_inst1.ora
Zoom image will be displayed

Comments

Post a Comment

Popular posts from this blog

Oracle 23ai — Speed up IMPDP Using NOVALIDATE Constraints

By -
  When executing the   IMPDP   command, some operations do not support parallel execution. Creating constraints is one such operation. Oracle must validate the current data in the table before creating a constraint, which requires a full table scan for each validation. This process can be very time-consuming. Consider the following constraints: ALTER TABLE VAHID.MYTB ADD CONSTRAINT CHECK1 CHECK (col3 > 50 ); ALTER TABLE VAHID.MYTB ADD CONSTRAINT CHECK2 CHECK (col9 IN ( 5 , 15 )); We drop the  MYTB  table and recreate it using a dump file: SQL > drop table mytb; Table dropped. W -1 Processing object type TABLE_EXPORT / TABLE / TABLE_DATA W -1 . . imported "VAHID"."MYTB" 19 GB 337830912 rows in 83 seconds using external_table W -1 Processing object type TABLE_EXPORT / TABLE / CONSTRAINT / CONSTRAINT W -1 Completed 2 CONSTRAINT objects in 208 seconds As shown, creating the two constraints ta...
Read more

Staging Tables in Oracle 23ai

By -
  As you may know, using   staging tables   is a common practice in   Data Warehouse   environments, primarily during the data loading process into the   Warehouse Database . Typically, raw data received from   source databases   is first loaded into a temporary area, referred to as   staging tables . After cleansing inconsistent and invalid data and transforming it into a standard format, the cleaned data is stored in the final operational tables. In addition to initial data loading,   staging tables   are also used for updates and are often truncated before reuse. In   Oracle 23ai , a new minor feature has been introduced for this purpose, allowing users to create tables specifically designed as   staging tables . This is achieved by adding the   FOR STAGING   clause to the   CREATE TABLE   statement. Creating Staging Tables Using the   FOR STAGING   clause, staging tables can be created as ...
Read more

Boolean Data Type in Oracle ِDatabase 23ai

By -
Image
  Oracle introduced the Boolean data type in SQL with version 23ai (although this data type has existed in PL/SQL previously). With this feature, you can define table columns as Boolean during table creation. SQL > CREATE TABLE jadval1 (id NUMBER, is_accept BOOLEAN ); Table created You can also use the keyword  BOOL  instead of  BOOLEAN : SQL > CREATE TABLE jadval1 (id NUMBER, is_accept BOOL); Table created You can set default values for Boolean columns: SQL > CREATE TABLE table1 (id NUMBER, is_accept BOOL DEFAULT FALSE ); Table created To populate the  is_accept  column, you can use the three keywords:  TRUE ,  FALSE , and  NULL : SQL > insert into table1 values ( 1 , true ); 1 row inserted SQL > insert into table1 values ( 2 , null ); 1 row inserted SQL > insert into table1 values ( 3 , false ); 1 row inserted SQL > select * from table1; ID IS_ACCEPT ---------- ---------- ...
Read more